Shock-absorber.



J. G. ROCK.

SHOCK ABSORBER.

APPLICATION FILED SEPT. 29, I914- v v I Patented June 15, 1915.

UNITED STAT TE T OFFICE.

JOHN GRAW 300K, or .Momvr vnnnon, YonK; ASSIGNOR mo VOLUTE srnme snocxAnsomsnn comran'v, orimoun'r VERNON,'NEW YORK.

sHook-ABsoRBEn.

Specification'of Letters Patent. i Patented June 15 1915.

Application'filed Sentember 29, 1914. serial No. 864,147.

To all whom it may concern: y Beit known that I, JOHN GRAW RocK, subjectof the King of'Norway, residing at Mount Vernon, in the county. ofWestchester and State of "New York, have invented certain new and usefulImprovements in Shock- Absorbers, of which the following is aspecification. k

This invention relates to shock absorbers for motor vehicles, moreparticularly to that form of shock absorber especially designed forlight weight cars such as theFord, in which style of car it is necessarythat the shock ,absorber stand upright mstead of hang, the object of theinvention beingto provide an improved form of shock absorbercomparatively simple in construction and operation and inexpensive toconstruct, and which, While essentially a spring-controlled shockabsorber, has the action of the spring thereof materially assisted by apneumatic action, 'and in which improved shock absorber all'the verticalstresses, whether up or down. will operate to compress the springOil/the shock absorber thus avoiding the usual and less desirablealternating compression and'tension efl'ects.

In the drawings accompanying and forming part of this specification,Figure 1 is a vertical sectional view of this improved shock absorber,Fig. 2 is .a similar view taken at. right angles to Fig. 1, with thespring omitted; and Fig. 3 is a cross-sec tionalview taken in line 3-3of Fig. 1.

Similar characters of reference indicate corresponding parts throughoutthe several figures of the drawings.

This improved shock absorber comprises,

in the preferred form thereof, a pair of members one of which may bedesignated as a casing member, and the other as a piston member, andboth of which have means for attachment to separate parts of a vehicle.

In the present improvement the casing member comprises a cylindricalcasing .2- interiorly threaded at'b'oth ends as at 3 and 4, the upperend of which is fitted with a cap or. closure 5 readily detachable andprovided with a closed threaded opening'G for the insertion of oil orgrease as occasion may require. Secured, 1n the present instance by.threads, to the lower end of this cylindrical casing isan annularchamber formed memher 7 having projecting therefrom a pair of 14, and

spaced ears or arms 8 provided with bolt open ngs 9 for the reception ofa bolt 10 and bushing 11. On the end of this bolt is a grease cup 12. Bymeans of this bolt this member of the shock absorber is attached to thespring of a'vehicle. This casing member is of different diameters, as at13 and has an annular shoulder 15. Located'within this casing member isthe piston member comprising acylindrical bifurcated piston head orblock 16 closely fitting the part 14 and provided with an interiorlythreaded hub 17 for the reception of a vertical piston rod or bolt 18;1s loosely mounted a recessed disk 19 having oil passages 20therethro'ugh communicating" with an annular groove 21in the top of thecylindrical block, which annular groove communicates by'one or more oilpassages 22, shown as two in number, with bolt openings 23 in thelower'spa-ced ends or arms 24 of-the cylindrical block 16. A bolt 25 issecured in these openings and to this bolt 25 a projecting arm 26 iscotter-pinned. This laterally projecting arm 26 has a stud 2.7 forinsertion into the hub of the vehicle axle. The headed end of the bolt18 hereinbefore referred 'to projects into, a tubular member 28 having acollar or flange 29 and the up- On this hub 17 per end 30 of whichmember fits into a circular opening 31 in the upper closure cap 5 sothat thecollar will engage the cap. Be-

tween this, flange or collar 29 and the disk 19 is loc'atedthe spring 32shown as a double pyramidal volute spring of fiat ribbon form. Inpractice, of course, the spring is normally under compression and thlscompression is increased by the relatively vertlcal movements of theparts.

In operation it will be observed that the space formed between thedisk19 and the annular shoulder 15 provides for an air cushion between theseparts. That is to say,

as the spring maintains the'disk 19 in en' gagement with the end of thepiston when the parts .are inthe' normal osition shown in Flg. 1 thereisan air cham er formed between the,disk 19. and the shoulder 15, so

tails may be more or less changed without departing from the spirit orscope of the improvement. v

I claim as my inventionz 1 1; A shock absorber comprising a cylindricalcasing having a piston chamberand a pair of spaced arms for attachmentto one pai t of a vehicle, a piston fitting'and sliding of a vehicle andalso provided witha piston rod, and a spring located on said rod betweensaid piston and the upper end of said casing.

3. An upright shock absorber comprising a cylindrical casing having apiston chamher and at its lower endv a pair of s aced armsfor attachmentto one part of a ve icle, a piston fitting and sliding within saidchamber and also having at its lower end spaced arms for attachment toanother part of a vehicle and also provided with a piston rod, and adouble pyramidal volutespring located on said rod between said pistonand the upper end of said casing, whereby the vertical. stress in eitherdirection'will compress the sprin mg within said chamber and a so havinglocated on said rod between spaced arms for attachment to another partof a vehicle and also provided with a piston rod, and a double pyramidalvolute spring located on said rod between said block and the end of saidcasing, whereby the vertical stress in either direction will compressthe spring.

5. A shock absorber comprising a cylindrical casing having a pistonchamber and a pair of spaced arms for attachment to one.

part of a vehicle, a piston fitting and sliding within said chamber andalso having spaced arms for attachment to another art of a vehicle andalso provided with a piston rod,

a loosely mounted disk carried by said piston, anda double pyramidalvolute'spring 6. A shock absorber comprising a cylindrical casing havinga pair of spaced arms for attachment to one part of a vehicle and saiddisk and the .end of said casing. I

a hub and also "having spaced" for attachment to another part of avehicle, a

said shoulder, and a sprin located between said disk and the end of saldcasing.

- 7 A shock absorber comprising a cylindrical casing having a pair ofspaced arms for attachment to one part of a vehicle and having anannular. shoulder, a cylindrical block sliding withinsaid casing andhaving a hub and also having spaced arms for attachment to another part015 a vehicle, a looselvmounted disk carried by said hub and forming anair chamber between it and said shoulder, a bolt projecting into saidhub, meansfor guiding the bolt at its'opposite end and comprising aflanged member, and a spring located between said disk and the flange ofsaid'meinber.

attaching means, and a spring carried by said rod between said pistonhead andithe end of said casing. I 9. An uprightshock absorbercomprising a cylindrical casing having at its lower end a pair of spacedarms'for attachment to one part of a vehicle and also having an annularshoulder,'a cylindrical block sliding within said casing and also havingspaced arms at its lower end, a laterally extending studded membersecured between said last spaced arm for attachment to another part of avehicle, a loosely mounted disk forming between it and said annularshoulder an air chamber, a bolt projecting into said block, means forguiding the upper end of said bolt, and a double pyramidal volute springlocated between said'disk and the upper end of the casing, a V o 10. Ashock absorber comprising a cylindrical casing of different diametersforming an annular shoulder and having at one end a pair of spaced armsfor attachment to one part of a vehicle and-a closed opposite end, acylindrical block slidingly fitting that part of the cylinder having thesmaller-diameter and having means for attachment to another part of avehicle, a bolt secured to said block, a disk fitting that part of thecasing having the larger diameter thereby to form an air cushion-betweenit and the annular shoulder, means carried by the bolt for engaging theclosed upper end of the casing, and a spring between said last-means andsaid disk.-

,. 11. A shock vabsorber comprising a cylindrical casing of difierentdiameters forming an annular shoulder and having at one end a pair ofspaced arms for attachment to one part of a vehicle and a closedopposite end, a piston head slidingly fitting that part of the cylinderhaving the smaller diameter and having means for attachment to anotherpart of a vehicle and also provi ed with a rod extending in the oppositeirection to said attaching-means, a bolt sec red to said block, a diskfitting that part of the casing having the larger diameter thereby toform an air cushion between it and the annular shoulder, means carriedby the rod for engaging the closed end of the'casing, and a doublepyramidal volute spring carried by said rod between said last means andsaid annular disk.

, of a vehicle, an upright bolt secured to said block, a disk fittinthat part of the casing having the larger iameter therebyto form an aircushion between it and the annular shoulder, means carried by the boltfor engaging'the closed upper end of the casing, and a double pyramidalvolute spring between said last means and said annular disk.

13. An upright shock absorber comprising a cylindrical casing ofdifferent diameters forming an annular shoulder and having at its lowerend a pair of spaced arms for attachment to one part of a vehicle and aclosed upper end, a cylindrical block slidingly fitting that part of thecylinder hav ing-the smaller diameter and having laterally projectingmeans at its lower end'hav ing a stud for attachment to another part ofavehicle, an upright bolt secured to said block, a disk fitting that partof the casing having the larger diametenthereby to form an air cushionbetween it and the annular shoulder, tubular flanged means carried bythe bolt for engaging the closed upper end- I of the casing, and adouble pyramidal volute spring between said last means and said annulardisk.

I 14. An upright shock absorber compris- 1n ab e closure at it's'upperend, a detachable chamber forming member at its lower end, such chamberforming member and casing 'tachable closure, and a a cylindrical casinghaving a detachforming an annular shoulder and said chamshoulder an airchamber, a bolt carried by said hub, a tubular flanged member forguidingthe opposite end of said bolt and projecting into the opening in theupper detachable closure, and a double pyramidal volute spring locatedbetween the flange. of said tubular member and said disk.

15. A11 upright shock absorber comprising a cylindrical casing having adetachable closure at its upper end, a detachable chamber forming memberat. its lower end, such chamber forming member and casing forming anannular shoulder and'said chamber forming member having a pair of spacedarms 'for attachment'to one part of a vehicle, a cylindricalblocklocated within said chamber forming member and having spaced armsat its lower end, a laterally projecting member secured between saidlast spaced arms for attachment to another part of a vehicle, and saidblock alsohaving a hub, a loosely mounted disk carried by said hub andforming between said disk and said shoulder an air chamber, a boltcarried by said hub, a tubular'flanged member for guiding the oppositeend of said bolt and projecting into the opening in the upper dedoublepyramidal volute spring located between the flange of said tubularmember and said disk.

16. A shock absorber comprising a member having a piston chamberand alsohaving means for attachment to one part of a vehicle,.a piston headfitting and sliding within said chamber and also having means .forattachment to another part of the vehicle and also provided with apiston rod ex- 7 tending in the opposite direction to said at tachingmeans, and a double acting pyramidal volute spring carried by said rodbetween said piston head and a fixed part of said member whereby thevertical stresses in either direction will compress said spring.

JOHN GRAW ROCK.

